Temporal range: Upper Carboniferous
|Figure by Edward Drinker Cope of the carapace and part of the abdomen of M. ordinatus from its 1886 description|
Mycteroptids were medium-sized to fairly large. Their outer surface had numerous scales and reticulate ornamentation. Their first and possibly second tergites (dorsal surfaces of the abdominal sections) were strongly developed. Their legs resembled those of Stylonurus. The prosoma (head) was subtrapezoid, with small compound eyes.
The three genera included in the Mycteroptidae, Mycterops, Woodwardopterus and Megarachne might represent different ontogenetic stages of each other based on the sizes of the referred specimens and the patterns of mucronation. This would sink the genera Woodwardopterus and Megarachne into Mycterops.
Mycterops whitei is a fragmentary species that might not be referrable to the genus at all if more complete specimens show that it has a caudal postabdomen.
The species currently seen as valid species of the genus are:
- Størmer, L 1955. Merostomata. Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata, P39.
- James C. Lamsdell, Simon J. Braddy & O. Erik Tetlie (2010). "The systematics and phylogeny of the Stylonurina (Arthropoda: Chelicerata: Eurypterida)". Journal of Systematic Palaeontology. 8 (1): 49–61. doi:10.1080/14772011003603564.
- Dunlop, J. A., Penney, D. & Jekel, D. 2015. A summary list of fossil spiders and their relatives. In World Spider Catalog. Natural History Museum Bern, online at http://wsc.nmbe.ch, version 16.0 http://www.wsc.nmbe.ch/resources/fossils/Fossils16.0.pdf (PDF).
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